Method CreateOrder

API/Controllers/OrdersController.cs:41–91

(CreateOrderDto orderDto)

    }

    [HttpPost]
    public async Task<ActionResult<Order>> CreateOrder(CreateOrderDto orderDto)
    {
        var basket = await context.Baskets.GetBasketWithItems(Request.Cookies["basketId"]);

        if (basket == null || basket.Items.Count == 0 || string.IsNullOrEmpty(basket.PaymentIntentId))
            return BadRequest("Basket is empty or not found");

        var items = CreateOrderItems(basket.Items);
        if (items == null) return BadRequest("Some items out of stock");

        var subtotal = items.Sum(x => x.Price * x.Quantity);
        var deliveryFee = CalculateDeliveryFee(subtotal);
        long discount = 0;

        if (basket.Coupon != null)
        {
            discount = await discountService.CalculateDiscountFromAmount(basket.Coupon, subtotal);
        }

        var order = await context.Orders
            .Include(x => x.OrderItems)
            .FirstOrDefaultAsync(x => x.PaymentIntentId == basket.PaymentIntentId);

        if (order == null)
        {
            order = new Order
            {
                OrderItems = items,
                BuyerEmail = User.GetUsername(),
                ShippingAddress = orderDto.ShippingAddress,
                DeliveryFee = deliveryFee,
                Subtotal = subtotal,
                Discount = discount,
                PaymentSummary = orderDto.PaymentSummary,
                PaymentIntentId = basket.PaymentIntentId
            };

            context.Orders.Add(order);
        }
        else 
        {
            order.OrderItems = items;
        }

        var result = await context.SaveChangesAsync() > 0;

        if (!result) return BadRequest("Problem creating order");

        return CreatedAtAction(nameof(GetOrderDetails), new { id = order.Id }, order.ToDto());
    }

    private long CalculateDeliveryFee(long subtotal)
    {